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Now that I'm 80 I looked at my retirement planning again.
Much of my thinking will be appropriate for younger people too.
Most of my retirement is in conservative growth stocks.
You can take this with a grain of salt, but I do have a graduate degree from Haas, the business school a Cal, and think the below is less BS than the talking heads on TV and can provide you with some useful facts.
The old rule that you should have a percent equal to your age in bonds. i.e. 80% bonds in my case, so you don't have to sell stocks at the bottom of the market when you have to move into a retirement home is obsolete. Even though bonds are at at at a high rate now, most people think they will go down to a more traditional rate of 3%.
My guideline is to plan that I may live as long as Uncle Johnny McBride, almost 100, and plan accordingly.
Politics is more uncertain now than it's been over my lifetime, but I believe that Trump views stock market performance as one of the top measures of his success, so we can hope that some of the nee-jerk decisions now will be adjusted over the next 4 years.

Another issue is "are we in a AI tech bubble" like the 1997-2000 .com bubble.
In the 1968 movie "2001: A Space Odyssey" HAL ,the AI computer on their space ship, sparked lot of hype about AI. It never came.
So AI can generate pictures and essays, drive cars, and carry on a conversation with you so you can't tell is a computer (i.e. pass the Turring Test) but cognitive intelligence is still a long way away.
As of today, the price-earnings (P/E) ratio is significantly lower compared to 2020, with the S&P 500 P/E ratio currently around 21-28 vs 39 in 2020.
But it is moving up. Price/Earnings Ratio

Even though the S&P 500, a common stock benchmark, has gone up 8.6% in the last 35 years I'm sticking with the idea that the growth over my lifetime will be 7%, the average over my lifetime.

The big picture.
Over my lifetime averaging out many corrections, bull and bear markets with many 30- 50% correction there have been:
 23 years of long term flat markets 
 1963-1977  14 years - Psychological resistance to breaking 1,000 on the Dow
 2000-2009  9 years - 2000 dot-com bust and 2008 financial crisis
 60 years of long term growth
 1935-1962 - 26 years of 9% growth
 1979-1999 - 20 years av 12%/yr growth
 2010-2024 - 14 years of 11% growth
If you could time the market and got out in 2020 and 2008 you would be a genius and average 11% growth.
There have been people who have correctly timed some of these downturns, but no one person or investment company has been able to time the market consistently.

Several of my friends have got lucky and bought one of the Magnificent 7, Apple (1980), Google (Alphabet), Nvidia (1999), Facebook (Meta) (2012), Microsoft* (2015), Amazon(2015),Tesla (2024) early in their growth cycle
* Microsoft went public in 1986 but did not take off until 2015
Company and
stock ticker		 Return 2024
1-year 5-year 10-year
Alphabet (GOOG) 35% 183% 673%
Amazon (AMZN) 51% 156% 1,252%
Apple (AAPL) 28% 196% 719%
Meta Platforms (META) 75% 234% 821%
Microsoft (MSFT) 2% 142% 936%
Nvidia (NVDA) 100% 1,937% 26,004%
Tesla (TSLA) 118% 878% 2,978%